UTD2000 Series User Manual - instruments.uni-trend.com

UTD2000 Series User Manual

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UTD2000 Series

User Manual


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Guaranty and Declaration Dear custumer,

Thank you for choosing this UNI-T device. In order to safely and correctly use this instrument .please read this manual thoroughly, especially the Safety Notes part. After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference.

Copyright Information

UNl-T Uni-Trend Technology (China) Co., Ltd. All rights reserved.

Trademark Information

UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.

Document Version

UTD2000 -20190520-V2.00

Statement

UNI-T products are protected by patent rights in China and foreign countries, including issued and pending patents.

UNI-T reserves the rights to any product specification and pricing changes. UNI-T reserves all rights. Licensed software products are properties of Uni-Trend and

its subsidiaries or suppliers, which are protected by national copyright laws and international treaty provisions.

Information in this manual supercedes all previously published versions.


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If this product is sold or assigned by the original purchaser to a third party within three years of purchase, the new owner should note that warranty is available for a period of three years from the day the original purchaser acquired the product from Uni-T or an authorized dealer. The probe, other accessories and fuses are not covered by warranty.

If any genuine defect is found during the valid warranty period, Uni-T has the option to repair the defective product without any charge for parts or labor, or replace it with another product (at the discretion of Uni-T). Uni-T may use parts, modules and replacement products that are brand new or repaired to a good-as-new standard. All old parts, modules and products that are removed during replacement become properties of Uni-T.

In this User Manual, “customer” means an individual or entity vested with the rights hereunder. To enjoy the warranty service, the “customer” must report any defect to Uni-T during the valid warranty period and make appropriate arrangement to allow servicing. The customer should pack the defective product in a container and deliver it to a maintenance centre specified by Uni-T. The customer should also prepay all freight cost and provide a copy of the original sales receipt issued to the original purchaser. If the product is to be delivered to an address within the country where the maintenance centre operates, Uni-T shall pay the cost of returning the product to the destination, all freight, custom duty, tax and other costs will be paid by the customer.

This warranty shall not apply to any defects or damages caused by accidental, machine parts’ wear and tear, improper use, and improper or lack of maintenance. UNI-T under the provisions of this warranty has no obligation to provide the following services:

a) Any repair damage caused by the installation, repair, or maintenance of the product by non UNI-T service representatives.

b) Any repair damage caused by improper use or connection to an incompatible device.

c) Any damage or malfunction caused by the use of a power source that does not conform to the requirements of this manual.

d) Any maintenance on altered or integrated products (if such alteration or integration leads to an increase in time or difficulty of product maintenance).

This warranty written by UNI-T for this product, and it is used to substitute any other express or implied warranties. UNI-T and its distributors do not offer any implied warranties for merchantability or applicability purposes.

For violation of this guarantee, UNI-T is responsible for the repair or replacement of defective products is the only remedy available to customers. Regardless of whether UNI-T and its distributors are informed that any indirect, special, incidental, or consequential damage may occur, UNI-T and its distributors shall not be responsible for any of the damages.


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General Safety Overview This instrument strictly complies with the safety requirements for electronic

measuring instrument GB4793 and IEC 61010-1 safety standard during design and manufacturing. Please understand the following safety preventative measures, to avoid personal injury, and to prevent damage to the product or any connected products. To avoid possible dangers, be sure to use this product in accordance with the regulations.

Only trained personnel can perform the maintenance program. Use the correct power line: Only use the dedicated UNI-T power supply appointed to

the local region or country for this product. Correct Plug: Don't plug when the probe or test wire is connected to the voltage

source.。 Ground the product: This product is grounded through the power supply ground wire.

To avoid electric shock, grounding conductors must be connected to the ground. Please be sure that the product is properly grounded before connecting to the input or output of the product.

Correct connection of oscilloscope probe: Ensure that the probe ground and ground potential are correctly connected. Do not connect ground wire to high voltage.

Check all terminal ratings: To avoid fire and the large current charge, please check all the ratings and the marks on the product. Please also refer to the product manual for details on the ratings before connecting to the product.

Do not open the case cover or front panel during operation。 Only use fuses with ratings listed in the technical index Avoid circuit exposure: Do not touch exposed connectors and components after

power is connected. Do not operate the product if you suspect it is faulty, and please contact UNI-T

authorized service personnel for inspection. Any maintenance, adjustment, or replacement of parts must be performed by UNI-T authorized maintenance personnel.

Maintain proper ventilation Please do not operate the product in humid conditions Please do not operate in inflammable and explosive environment Please keep the product surface clean and dr


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Safety Terms and Symbols The following terms may appear in this manual: Warning: The conditions and behaviors may endanger life. Note: The conditions and behaviors may cause damage to the product and other properties. The following terms may appear on the product: Danger: Performing this operation may cause immediate damage to the operator. Warning: This operation may cause potential damage to the operator. Note: This operation may cause damage to the product and devices connected to the product. The following symbols may appear on the product:


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Preface The Manual introduces information related to operation of digital storage oscilloscope

of UTD2000 series user manual series. The Manual comprise the following chapters: Chapter 1 Introduction Guide Chapter 2 Vertical channel setting Chapter 3 Horizontal system setting Chapter 4 Trigger system setting Chapter 5 Sampling system setting Chapter 6 Display system setting Chapter 7 Automatic measurement Chapter 8 Cursor measurement Chapter 9 Storage and callback Chapter 10 Auxiliary function setting Chapter 11 Other function keys Chapter 12 Applicaion example Chapter 13 System prompt and troubleshooting Chapter 14 Technical specification Chapter 15 Appendix

UTD2000 Series Digital Storage Oscilloscope contains the following 6 models

Series Model Band width Real-time

UTD2000L UTD2025CL 25MHz 250MS/s

UTD2052CL 50MHz 500MS/s

UTD2102e UTD2102e 100MHz 500MS/s

UTD2000EX

UTD2052CEX 50MHz 1GS/s



UTD2000 series provide the users with front panels with simple operation and clear functions to perform all the basic operations. Scale and position knobs of each channel provide visual operations that are suitable for user habits as the traditional instrument. Usersmay be able to master it without spending plenty of time learning and understanding operations of any UTD2000 series DSO. In order to accelerate adjustment and facilitate measurement, the users can directly press AUTO key and the instrument will then display applicable waveform and gear position settings.

Apart from easy to use, UTD2000 series DSO also has high performance indexes and powerful functions required for faster completion of measurement tasks. Powerful trigger and analysis ability make it easier to capture and analyze waveforms. Clear LCD and mathematical operation functions make it easier for users to observe and analyze


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signal problems in a faster and clearer way. From the following parameter features, you can understand how this series of DSO

can satisfy your measurement requirements. Two analog channels High resolution LCD display 400×240 (or 800×480) resolution Support plug and play USB storage equipment or be capable of communicating with

computer via USB storage equipment. Automatic waveform and state settings Waveform saving and replay feature Delicate window extension function and precise analysis on waveform details and

overview Automatic measurement of 28 waveform parameters Automatic cursor tracking measurement function Unique functions of waveform recording and playback. Built-in FFT software function Multi-waveform mathematical operation function (including: addition, subtraction,

multiplication and division) Edge, Video, Pulse width, Alternating trigger and other functions Multi-language menu selection


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Contents Guaranty and Declaration ................................................................................................... 2

General Safety Overview ..................................................................................................... 4

Safety Terms and Symbols ................................................................................................. 5

Preface 6

Contents ................................................................................................................................ 8

Chapter I Introductions ................................................................................................... 10

1.1 General Inspection ........................................................................................... 11

1.2 Function Inspection ......................................................................................... 11

1.3 Probe Compensation ....................................................................................... 13

1.4 Automatic Settings of Waveform Display ...................................................... 13

1.5 Introduction to The Vertical System ............................................................... 13

1.6 Introduction to The Horizontal System .......................................................... 14

1.7 Introduction to The Trigger System ............................................................... 15

Chapter II Vertical System .............................................................................................. 16

2.1 Setting coupling channel ................................................................................ 16

2.2 Setting channel bandwidth Limited ................................................................ 17

2.3 Setting probe Rate ........................................................................................... 18

2.4 Vertical Volts/Div adjustment setting ............................................................. 19

2.5 Settings of waveform inverting ....................................................................... 19

2.6 Mathematical operation function .................................................................... 20

2.7 FFT spectral analysis ....................................................................................... 21

Chapter III Horizontal System ........................................................................................ 23

3.1 Horizontal control ............................................................................................ 23

3.2 Explanation of nouns....................................................................................... 23

3.3 Window extension ........................................................................................... 24

3.4 Trigger hold-off time adjustment .................................................................... 24

Chapter IV Trigger System ............................................................................................. 26

4.1 Edge trigger ...................................................................................................... 26

4.2 Pulse width trigger ........................................................................................... 27

4.3 Video trigger ..................................................................................................... 28

4.4 Alternating trigger ............................................................................................ 29

4.6 Explanation of nouns....................................................................................... 30

Chapter V Acquire System ............................................................................................. 31

Chapter VI Display System ............................................................................................. 33

6.1 XY Mode ............................................................................................................ 33

Chapter VII Measurement Parameters .......................................................................... 36

7.1 Measurement Menu ......................................................................................... 36

7.2 Voltage Parameter ............................................................................................ 36


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7.3 Time parameter ................................................................................................ 37

Chapter VIII Cursor Measurement ................................................................................. 38

Chapter IX Storage and Load System........................................................................... 39

9.1 Setup storage and load ................................................................................... 39

9.2 Waveform storage and load ............................................................................ 39

9.3 Bit map storage and load ................................................................................ 41

9.4 Screen copy ...................................................................................................... 41

Chapter X Utility System ................................................................................................. 42

10.1 Pass/Fail ......................................................................................................... 42

10.2 Recorder ......................................................................................................... 44

Chapter XI Other funtion botton .................................................................................... 45

11.1 AUTO ............................................................................................................... 45

11.2 RUN/STOP ....................................................................................................... 45

11.3 Help Menu ....................................................................................................... 46

11.4 Upgrade program ........................................................................................... 46

Chapter XII Applicaion example .................................................................................... 48

Example 1: Measuring simple signals ................................................................. 48

Example 2: Observing the delay caused by a sine wave signal passes through the circuit ................................................................................................................ 48

Example 3: Acquiring single signals .................................................................... 49

Example 4: Reducing random noise of signals ................................................... 50

Example 5: Using the cursors for measurement ................................................. 52

Chapter XIII System Prompts and Trouble-shooting.................................................. 54

13.1 Definitions of System Prompts ..................................................................... 54

13.2 Troubleshooting ............................................................................................. 54

Chapter XIV Technical Information ............................................................................... 56

Chapter XV Appendix ...................................................................................................... 60

Appendix A Accessories of UTD2000 Series ....................................................... 60

Appendix B Maintenance and Cleaning ............................................................... 60

Appendix C Warranty ............................................................................................. 60

Appendix D Contact Us ......................................................................................... 61


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Chapter I Introductions UTD2000 series DSO is desk type DSO. It is designed with conventional user

interface design for any of the basic DSO at the test and measurement industry. This chapter will cover the following as the beginning guide the UTD2000 series

DSO: General inspection Functional inspection Probe compensation Automatic settings of waveform display Introduction to the vertical system Introduction to the horizontal system Introduction to the trigger system

When beginning to use your UTD2000L oscilloscope, first familiarize yourself with the operation front panel. This chapter briefly describes the operation and functions of the front panel, so you can get started with your UTD2000L series digital storage oscilloscope as quickly as possible.

Your UTD2000L oscilloscope comes with a front panel with at-a-glance functions for easy operation. There are knobs and function keys on the front panel. The functions of knobs are similar to other Oscilloscope. On the right you will find the screen copy key (PrtSc) which enables you to save the current screen in an external USB device in picture format and 5 menu operation keys (designated as F1 to F5 from top down). With these keys you can set up different options of the current menu. The other keys are function keys. You can use them to enter different function menus or access particular functions directly

Figure 1-1 Schematic Diagram of the UTD2000L Front Panel

Display horizontal trigger position

Multipurposeknob User Menu

RUN/STOP control

Prscrn function key

Trigger control

Horizontal control

Vertical control

USB OTGInterface

Single Input

External trigger Input

Probe compensationsingal output


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Figure 1-2 UTD2000 Series DSO User Interface Menu Display

1.1 General Inspection After purchasing a new UTD2000 DSO, we recommend you to inspect the instrument

according to the following steps. (1) Inspect whether there are damages caused by transportation

In case of badly damages to packing box or foamed plastic mat, you should replace immediately. (2) Accessories inspection

For provided accessories details, description has been made in aforesaid “accessories of UTD2000 DSO” item of this user manual. Please check whether there are shortages in the accessories. If you found shortage or damages of accessories, please contact the UNI-T distributors distributing the product or local offices of UNI-T. (3) Check the complete instrument

In case of damages to the appearance of instrument, abnormal operation or failure to pass the performance tests, please contact the UNI-T product distributors or local UNI-T offices.

If the instrument is damaged due to transportation, please pay attention to keeping the package, notify transportation department and UNI-T product distributors and UNI-T will make arrangement for repair or replacement.

Warning: please confirm that the DSO has been safely grounded to avoid hazard.

1.2 Function Inspection Conduct a fast function inspection to verify whether the instrument is in normal

operation. Please take the steps as follows: (1) Power on the instrument:

The power supply voltage range is from 100 VAC to 240 VAC, the frequency range is 45Hz to 440Hz. Connect the oscilloscope to the power supply line that came with the

Trigger state display Display time of center scale line

Channel 1 mark

Channel 2 mark

Menu Area

Waveform display window

Display channel vertical scale coefficient Display main time base setting


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oscilloscope or any power supply line that meets the host country standards. Press the power switch button on the top of the oscilloscope, The oscilloscope then will show a boot animation, and it will enter the normal interface afterwards. Warning: please confirm that the DSO has been safely grounded to avoid hazard. (2) DSO accessing to signal

UTD2000 series DSO has two input channels with an additional external trigger input channel. Please check the signal according to the following steps.

① Connect DSO probe to CH1 input terminal and set the attenuation rate switch on the probe as 10× (Figure 1-3)

② It is required to set probe attenuation coefficient on DSO. Attenuation coefficient changes the vertical gear position rate of instrument, thus

making the measurement result correctly reflect the amplitude of measured signals. Probe attenuation coefficients are set in the following ways: press F4 to make the menu display 10×.

Figure 1-3 Setting of attenuation coefficient on DSO

③ Connect the probe pin and ground clamp to the corresponding terminal of the probe compensation signal. Press AUTO key. Within several seconds, square wave display (1kHz, about 3V, peak-to-peak value) is as shown in Figure 1-7. Check CH2 in the same way; press CH1 function key to close CH1; press CH2 function key to turn on CH2; repeat step 2 and step 3.

Figure 1-4 Probe Compensation Signal


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1.3 Probe Compensation

When connecting the probe with any input channel for the first time, it is required to make adjustment for this item, matching the probe with input channel. Probe without being compensated and corrected will lead to measurement error or mistake. In case of adjustment of probe compensation, follow the following steps:

(1) Set the probe menu attenuation coefficient as 10×, place the switch on the probe at 10× and connect DSO probe with CH1. Connect the probe end and signal output connector to the probe compensator, the ground clamp and ground lead connector of probe compensator, turn on CH1 and press AUTO.

(2) Observe displayed waveform

Figure 1-5 Probe Compensation and Correction

(3) If screen displays “under-compensation” or “over-compensation” for waveform as

shown in above figures, use screwdriver with nonmetal handle to adjust the variable capacitance on the probe until screen displays “correct compensation” for waveform as shown in the below figure.

Warning: in order to avoid electric shock when measuring high voltage with

probe, please ensure that the insulation lead of the probe is in good condition and do not contact the metal part of the probe when connecting high pressure power supply. 1.4 Automatic Settings of Waveform Display

UTD2000 series DSO has automatic setting function. According to input signals, automatically adjust the vertical deflection factor, scanning time base and trigger mode until the most appropriate waveform is displayed. Apply automatic setting, the frequency of the measured signal is required to be ≥ 50Hz and the duty ratio is > 1%.

Apply automatic setting: (1) Connect measured signal to signal input channel. (2) Press AUTO key. DSO will automatically set its vertical deflection factor, scanning

time base and trigger mode. If further careful observation is required, adjustment can be conducted again after automatic settings until the waveform display reaches required optimum effect.

1.5 Introduction to The Vertical System

As shown in the figure below, there are a series of keys and knobs in the vertical

Over-compensation Correct compensation Under-compensation


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control area. Practices below will gradually guide you to get familiar with the controlling of the vertical system.

Figure 1-6 Vertical Control Area on the Panel

(1) Turn the vertical position knob to display the signal in the centre of the window.

The vertical position knob controls the vertical displaypositionof the signal. When you turn the vertical position knob, the sign indicating the. GROUND channel

will move up and down with the waveform. (2) User should see the waveform will move vertically upward and downward when

the knob is rotating. (3) User can also change the waveform scale by rotating the Scale Knob on the

vertical system. Please notice that the “V/div” will be changed to indicate the corresponding vertical scale level.

(4) User can enable/disable the input channel by pressing the CH1 and CH2 button on the vertical system.

All of the other vertical system setting will be explain more on chapter II of this user manual.

1.6 Introduction to The Horizontal System

As shown in the figure below, there is one key and two knobs within the horizontal control area. Practices below will gradually guide you get familiar with the setting of horizontal time base.

Figure 1-7 Horizontal Control Area on the Panel


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1. Use horizontal SEC/DIV knob to change gear position settings of horizontal time

base and observe the changes of state information. Turn horizontal SEC/DIV knob to change “s/div” time base gear position, and you can find that corresponding changes have taken place in the time base gear position display of corresponding channel in the status bar.

Horizontal scanning rate steps up in the multiple of 1,2 and then 5 e.g. 1ms/div->2ms/div->5ms/div->10ms/div…. etc. *Note: the horizontal time base range of different UTD2000 models are varies

between 2ns/div to 50s/div. Details is listed in technical specification. 2. Use horizontal POSITION knob to adjust the horizontal position of the signal in the

waveform window. Horizontal POSITION knob controls the trigger position of the input signal. When applying to trigger position and turning horizontal POSITION knob, it is possible to observe the horizontal movement of waveform along with POSITION knob turning.

All of the other horizontal systemsetting will be explain more on chapter II of this user manual.

1.7 Introduction to The Trigger System

As shown in Figure 1-11, there is one knob and three (or two) keys in trigger menu control area. Practices below will gradually guide you to be familiar with the setting of.

Figure 1-8 Trigger Menu on the Panel

(1) Turn trigger level knob to change trigger level. Please refer to the trigger

marking on the screen to indicate the trigger level line. The trigger level line should move up/down corresponding when turning the trigger control panel knob.

(2) Press SET TO ZERO key on the oscilloscope to enable 50% amplitude triggering; All of the other trigger systemsetting will be explain more on chapter II of this user

manual.


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Chapter II Vertical System Each channel for UTD2000 series DSO can be set independently through the vertical

system menu. After pressing CH1 or CH2 function key, the system shall display function menu of CH1 or CH2 channel. See Table 2-1 below for description. Table 2-1 Channel Menu

Function Menu Setting Description

Coupling

AC Block the DC component of input signal.

DC Pass through DC and AC components of input signal

GND Disconnect input signal

BW Limit ON Limit bandwidth to 20MHz to reduce displayed noise.

OFF Turn off bandwidth limited

Volts/Div

Coarse Set vertical deflection factor by coarse adjustment based on 1-2-5 scale.

Fine Rough adjustment setting range is further subdivided for fine adjustments to improve

vertical resolution.

Probe

1×

10×

100×

1000×

Please set the probe compensation system ratio to match the probe attenuation

coefficient of the probe to be used.

Invert ON Activate reverse function of waveform. Waveform will be displayed reversely

OFF Waveform is displayed normally.

2.1 Setting coupling channel You will be learning through the following example to change the coupling of the input channel. If the measured signal connect to the CH1 channel is a sinusoidal signal containing DC component. If your press F1 to select as AC coupling, to set the CH1 into AC coupling mode. Then the DC component of the measured signal is blocked. Waveform display is shown in figure below.

Figure 2-1 Blocked DC Component of Signal

If you press F1 to select as DC coupling, setting the CH1 to DC coupling mode. You should be able to see both the DC and AC components of measured signals at CH1 channel as shown in figure below.


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Figure 2-2 Simultaneous Display of Signal DC and AC Components

If you Press F1 to select as GND, to set CH1 to connect to the internal ground of the instrument, both DC and AC components of the input signal are blocked. And, waveform display is shown in figure below.

(Note: although no waveform is displayed on the screen in this mode, input signal is still connected with channel circuit.)

Figure 2-3 Simultaneous Blocking of Signal DC and AC Components

2.2 Setting channel bandwidth Limited

You will be learning through the following example to change the bandwidth limited of the input channel. Assuming that the input signal is a 40MHz sinusoidal signal connect to CH1. If you press F2 to set BW Limit as OFF, there will be not any bandwidth limited to CH1. And, you can see all the high-frequency component in measured signal as waveform displayed is shown in the figure below.


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Figure 2-4 Waveform Display When Setting Bandwidth throttling in OFF Position

If you press F2 again to set the BW Limit as ON, the noises or high-frequency

component over 20MHz in measured signal shall be attenuated, as waveform display shown in figure below.

Figure 2-5 Waveform Display When Setting Bandwidth throttling as ON 2.3 Setting probe Rate

In order to cooperate with attenuation coefficient setting of probe, it is required to set the probe attenuation coefficient in channel function menu. If the probe attenuation coefficient is 10:1, the probe coefficient in channel function menu shall be set to be 10× and vice-versa.

BW Limit ON

BW Limit Mark


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Figure 2-6 Probe Attenuation Coefficient Setting in Channel Menu

2.4 Vertical Volts/Div adjustment setting

Adjustments of vertical deflection factor V/div gear position can be set to coarse adjustment and fine adjustment by pressing F3 function key.

Coarse adjustment, V/div can be adjusted in step ofmultiple of 1,2 and 5, e.g. 10mV/div->20mV/div ->50mV/div…. etc. Fine adjustments refer to changing deflection factor with smaller stepping within the

current vertical gear position range.

Figure 2-7 Coarse and Fine Adjustment of Vertical Deflection Factors

2.5 Settings of waveform inverting Waveform inverting can be set by F5 function button. The measured input signal will be display with 180 degrees difference (Vertically invert) if the Waveform inverting is ON. Please see Figure 2-8 for a non-inverted waveform and Figure 2-9 for an inverted waveform.


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Figure 2-8 Vertical Channel Inverted Settings (Invert: OFF)

Figure 2-9 Vertical Channel Inverted Settings (Invert: ON)

2.6 Mathematical operation function

UTD2000 series DSO support mathematical operation function for the input signals. Figure below show the match result for CH1 + CH2 as example.

Figure 2-10 Math Operation


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After pressing theMATH button at the menu area to active mathematic operation. Table 2-2：Math Menu


Type Math Mathematic operation (+、–、×、÷)

Source1 CH1 You can select signal source1 as CH1

or CH2 CH2

Operator

+ Source1+Source2

– Source1–Source2

× Source1×Source2

÷ Source1÷Source2

Source2 CH1 You can select signal source2 as CH1

or CH2 CH2

2.7 FFT spectral analysis

By pressing F1 button again at mathematical operation mode to enter FFT (fast fourier transform) operation, the time domain (YT) signal can be converted into frequency domain signal.

At FFT operation, it is convenient to observe signals of the following types: Measure harmonic content and distortion in the system Display noise characteristic in DC power supply Analyze vibration Table 2-3：FFT Menu Description


Type FFT FFT mathematical operation

Source CH1 You can select signal source as

CH1 or CH2 CH2

Window

Hanning

Set to select Hanning, Hamming,

Blackman, or Rectangle window

function

Hamming

Blackman

Rectangle

Vertical unit Vrms Set vertical units as Vrms or

dBVrms dBVrms

Select FFT window

Assuming that YT waveform is continuously repeated, DSO shall conduct FFT conversion for time record with finite length. In this case, when the cycle is an integer, YT waveforms are of the same amplitude at the starting and ending positions, without interrupting. However, if the cycle of YT waveform is not an integer, the waveform


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amplitudes shall be different at starting and ending positions. Therefore, high-frequency transient interruption shall occur at the joints. In frequency domain, this effect is called leakage. Therefore, in order to avoid the generation of leakage, by multiplying original waveform by a window function, the value at forced starting and ending positions is 0. See the table below for window function application: Table 2-4：FFT window function FFT Window Features The most suitable measurement content

Rectangle

The best frequency resolution and the worst

amplitude resolution. It is basically similar to

the condition without window.

Signal levels, before and after transient state or

short pulse, are basically equal. Constant

amplitude sinusoid with very similar frequency

possesses bandwidth random noise with slow

spectrum change.

Hanning

Compared with rectangular window, it has

better frequency resolution and worse

amplitude resolution.

Random noise of sine, cycle and narrow-band.

Hamming The frequency resolution of Hamming window

is slightly superior to Hanning window.

Signal levels, before and after transient state or

short pulse, are of large difference.

Blackman The best amplitude resolution and the worst

frequency resolution.

Mainly used for single frequency signal seeking

for higher subharmonic.

Explanation of nouns FFT resolution: defined as the quotient of sampling and operation point. When the number of operation point are fixed, the lower the sampling rate is, the better the FFT resolution will be. Nyquist frequency: for waveform with maximum frequency of f, at least 2f sampling rate is required to reconstruct original waveform. It is also called Nyquist rule, where f refers to Nyquist frequency, while 2f refers to Nyquist sampling rate.


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Chapter III Horizontal System 3.1 Horizontal control

Figure 3-1 Horizontal System Interface (1) Horizontal control knob

Using the horizontal control knob can change the horizontal scale (time base) and trigger horizontal position (trigger position) in internal storage. The vertical midpoint in screen horizontal direction is the time reference point of waveform. Changing of horizontal scale can lead to expansion or shrink of waveforms relative to screen center. When the horizontal position changes, the position relative to waveform trigger point will be changed.

The horizontal system can be controlled by the following panel buttons/knobs. The horizontal position control knob is use to adjust the horizontal position of channel

waveform (including mathematical operation). The resolution of the horizontal position control knob varies at different time base.

Horizontal scale control knob is use to change the time base of the channel waveform, by shown as s/div. If the extension time base is being turn on, the window width will be changed by due to the delay scanning time base through turning the horizontal scale knob. (2) Horizontal menu button

user can press to enter the horizontal menu function. (See table below) Table 3-1 HORI MENU


Main —— Press to turn on the main time base

——

Window —— Press to turn on the extension time base

——

Hold off To adjust the trigger hold-off time by multi-purpose knob

3.2 Explanation of nouns YT Mode：In this mode, the Y axis represents the amount of voltage, and the X axis represents the amount of time. XY Mode：In this mode, the X axis represents the CH1 voltage amount, and the Y axis represents the CH2 voltage amount.


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Scan Mode：When the horizontal time base control is set at 100ms/div or slower, the instrument enters the slow scan sampling mode. When using the slow scan mode to observe low frequency signals, it is recommended to set the channel Coupling to DC. SEV/DIV：Horizontal scale (time base) units, such as waveform sampling is stopped (using the RUN/STOP button), and the time base control expands or compresses the waveform.

3.3 Window extension

Window extension time base function is used to observe the waveform detail for a given window of the waveform. User can active this function by pressing F3 button at the horizontal function menu.

Figure 3-2 Screen Display under Window Extension

Under Window extension time base, there are two display areas, as shown in the figure above. The original waveform is displayed in the upper part, this area can be moved left and right by turning horizontal POSITION knob or can be enlarged and reduced by turning the horizontal SEC/DIV knob.

The waveform generated through horizontal extension time base of the selected original waveform area shall be displayed in the lower part. As the waveform displayed in the whole lower part corresponds to the selected area in the upper part, the extension time base can be enhanced by turning horizontal SEC/DIV knob to reduce the selected area of the waveform. 3.4 Trigger hold-off time adjustment

Trigger hold-off time is the time interval between two trigger events (100ns by default); Trigger hold-off time can be adjusted by using the multi-purpose knob at the horizontal function menu.

During trigger hold-off, DSO will not be triggered any new event until the hold-off time is over. For example, if a set of pulse train shall be triggered from the first pulse upon request, then the hold-off time can be set as the pulse train width. As shown as below.

Waveform horizontal extension part

Waveform horizontal extension part

Extension time base


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Figure 2-13 Trigger Hold-off for Synchronization of Complex Waveform


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Chapter IV Trigger System Trigger level knob: trigger knob is used to adjust the trigger level (To set the voltage

level corresponding to trigger point). Trigger Type UTD2000 series DSO support: Edge, Pulse, Video and Alternative trigger; Edge Trigger: edge trigger mode refers to triggering of trigger threshold on the input signal edge. Pulse Width trigger: trigger produces when the pulse width of the trigger signal satisfies some set trigger >, < or = condition. Video Trigger: conduct field or line trigger for standard video signal (Only for UTD2025CL) These tree triggering can by active by pressing F1 button at the TRIG MENU . Alternating trigger: applicable to trigger signals without frequency correlation. All kinds of trigger menus shall be respectively described as follows. User can active Alternative trigger by pressing F2 button at the TRIG MENU .

4.1 Edge trigger

Edge trigger mode refers to triggering of trigger threshold on the input signal edge. When selecting “edge trigger”, trigger on the rising edge or falling edge of input signal shall be completed. Table 4-1 Edge trigger menu Function Menu Setting Description

Type Edge

Source

CH1 Set CH1 as the triggering signal source


EXT Set external trigger input channel as the triggering signal source

AC Line Set AC power line as trigger source

Alter Set to Alternative trigger between CH1 and CH2 as signal source

Slope

Rising Set trigger on the signal rising edge

Falling Set trigger on the signal falling edge

Rise/fall Set trigger on the signal both rising and falling edge

Mode

AUTO Set to automatic trigger. The DSO will continuously perform data acquisition

without triggering signal.

Normal Set to normal trigger. The DSO will only perform data acquisition when there is

triggering signal.

Single Set to single trigger. The DSO will only perform 1 cycle of the data acquisition

when there is triggering signal.

Coupling AC Block the DC component of triggering signal


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DC Pass through DC and AC components of triggering signa

HF Reject high-frequency component of the triggering signal (over 80kHz signals)

LF Reject low-frequency component of the triggering signal (below 80kHz signals)

4.2 Pulse width trigger

For pulse width trigger, the trigger time shall be subject to pulse width of the triggering signal. You can capture abnormal pulse by setting pulse width conditions. Table 4-2 Pulse width trigger menu (page 1) Function Menu Setting Description

Type Pluse

Source






Pulse width

conditions

> Trigger when pulse width is greater than Pulse Width setting values

< Trigger when pulse width is less than Pulse Width setting values

= Trigger when pulse width is equal than Pulse Width setting values

Pulse width

setting

Set the pulse width to between 20ns~10s by using the multi-purpose knob on

the front panel。

Next 1/2 Go to next page

Table 4-3 Pulse width trigger menu (page 2) Function Menu Setting Description

Type Pluse

Polarity Positive Set the positive pulse width as trigger signal

Negative Set the negative pulse width as trigger signal

Mode

AUTO Set to automatic trigger. The DSO will continuously perform data acquisition



triggering signal.



Coupling

AC Block the DC component of triggering signal




Previous 2/2 Go to previous page


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4.3 Video trigger

UTD2025CL support video trigger compactable to NTSC or PAL standard video signals. (Only UTD2025CL have such functions)

Trigger coupling will automatic preset to DC coupling if the video trigger is active. Video trigger menus are shown in the table below: Tabel 4-4 Video trigger menu Function

Menu Setting Description

Type Viedo

Source






Standards PAL Select to PAL video standard

NTSC Select to NTSC video standard

Sync

All line Set trigger synchronize to video line.

Lines Set the video to sync and trigger on specific lines

Even field Set the video to sync and trigger on even field

Odd field Set the video to sync and trigger on odd field

Figure 4-1 is an example screen display when PAL video trigger model is selected as

standard and synchronization mode is All line synchronization.

Figure 4-1 Video Trigger: Line Synchronization

Figure 4-2 is an example screen display when PAL video trigger model is selected as standard and synchronization mode is set to field synchronization.


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Figure 4-2 Video Trigger: Field Synchronization

4.4 Alternating trigger

During alternating trigger, the trigger signal comes from two input channels CH1 and CH2 alternatingly. Alternating trigger is useful for observing two signal with different frequency.

See the figure below for display of triggered alternating waveform example and Table 4-4 for triggered alternating menu setting

Figure 4-3 Observing Signals with Two Different Frequencies by

Alternating Trigger Mode Table 4-4 Alternating Trigger Mode Setting


Type Edge

Source Alternating CH1 and CH2 alternating trigger

Slope

Rising Set trigger on the signal rising edge

Falling Set trigger on the signal falling edge

Rise/fall Set trigger on the signal both rising and falling edge

Mode AUTO Set to automatic trigger. The DSO will continuously perform data acquisition


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4.5 Explanation of nouns (1) Trigger source: trigger can be achieved from several signal sources: input channels (CH1 and CH2), external triggers (EXT and EXT/5) and AC line. External trigger (EXT TRIG): meaning to set the triggering source base on given external connection to the “EXT TRIG” input channel. This can be signification application for UTD2000 series to perform data acquisition using CH1 and CH2 based on an external clock signal connects to the “EXT TRIG” input channel. External trigger signal connects to “EXT TRIG” input terminal is used for EXT trigger source selection. When selecting EXT as trigger source, external trigger levels voltage range limited to -3V and +3V. AC line trigger: use AC line power as trigger source. This can be signification application to observe the signals correlated to AC line power for applications in lighting equipment and power supply equipment R&D development. (2) Trigger mode:deciding the behavioral pattern of DSO under no trigger event conditions. Three trigger modes are provided for DSO: auto, normal and single. Auto trigger: Set to automatic trigger mode. The DSO will continuously perform data acquisition without triggering signal. When there is trigger signal, DSO will automatically synchronizing with the trigger signal. Attention: when scanning waveform is set as 50ms/div or slower time base, no trigger signal is allowed under “auto trigger” mode. Normal trigger: Set to normal trigger mode. The DSO will only perform data acquisition only when trigger conditions are satisfied. When trigger condition is not satisfied, DSO stops data collection. Single trigger: Set to single trigger mode. The DSO will only perform one cycle of data acquisition only when trigger conditions are satisfied. When trigger condition is not satisfied, DSO stops data collection.



triggering signal.



Coupling

AC Block the DC component of triggering signal





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Chapter V Acquire System User can change the data acquisition setting of the DSO by pressing the ACQUIRE button as shown in the figure below UTD2000 series DSO.

Figure 5-1 Function Key of Acquire System

While ACQUIRE button is pressed, the function menu will change to set the data acquisition setting for the DSO. Table 5-1 Acquire Function Menu Function Menu Setting Description

Acquisition

Mode

Sampling Set to sampling acquisition mode.

Peak value Set to peak value acquisition mode.

Average Set to average acquisition mode.

Averages 2~256 At the average sampling mode, set average number by using the multipurpose

knob (Average number can set to 2,4,8,16,32,64,128,256)

Sampling Real-time Set to Real-time sampling.

Equivalence Set to Equivalent sampling.

Fast Acq ON Turn on fast acquiring. Waveform capturing rage up to at 2k waveform/second.

OFF Turn off fast acquiring.

——

By changing the acquisition setting of the DSO, user can observe the input signal at different manner. Example below is a noise waveform acquired by different acquisition setting of the UTD2000 series DSO.

Figure 5-1 shows the original signal using sampling acquisition, user can see that the waveform display is very noise.

Figure 5-2 shows the same signal with average acquisition of a 32 number, please observe that the waveform display become much more smooth.

Figure 5-1 using sampling method Figure 5-2 using average acquisition of 32 number


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Notice: (1) Please select real-time sampling mode when observing single signal. (2) Please select equivalent sampling mode when observing high frequency periodic signal. (3) Please select peak detection mode when hoping to observe the signal envelope for any modulation signal. (4) Please select average sampling mode when hoping to reduce the random noise in displayed signals. Explanation of nouns Real-time sampling mode:

Data sampling at the real-time sampling rate of the system. This is used to observe any waveform within the sampling rate of the system. Equivalent sampling mode:

Data sampling at higher than maximum sampling rate of the system. This is used to observe any periodical waveform at beyond the maximum sampling rate.


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Chapter VI Display System User can change the display setting of the DSO by pressing the DISPLAY button of

the UTD2000 series DSO as figure below.

Figure 6-1 Function Keys of Display System

After press DISPLAY button, the function menu will change to the display setting for the DSO. Table 6-1 Display Menu


Types Vector Display as vector of sampled data points

Dots Display any of the sampled data points

Format

YT Display Y-axis as voltage level of input signal and X-axis as time

XY Display Y-axis as CH2 voltage level of input signal and X-axis as CH1 voltage

level of input signal

Persist

Off Real-time updating (Display) of the acquired signal.

1s Display the acquired signal every 1s



Infinite Accumulate display all the acquired

——

Brightness 1%-100% Set the brightness of the waveform by multi-purpose node between 1%-100%

brightness.

6.1 XY Mode The phase difference between the two signals of the same frequency can be easily observed by Lissajous method. The following chart gives the observation of phase difference.


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Since sinθ = A/B or C/D, theta (θ) is the angle between the two signals, the definition of A, B and C, D is shown above. We can draw a difference angle θ = ± arcsin(A/B) or θ = ± arcsin(C/D). If the principal axis of an ellipse is in quadrants I and III, then the phase angle should be in I, IV quadrant, in 0 to (π/2) or (3π/2) to 2π. If the principal axis of an ellipse in II, IV quadrant, then the phase angle should be (π/2) to π or π to (3π/2).

In addition, if the frequency or phase difference of the two detected signals is an integer, the frequency and the phase relationship between the two signals can be calculated .

Furthermore, if the frequencies and phase differences of two signals being measured are whole multiples, you can calculate the frequency andphase correlationbetween the twosignals.

Figure 6-3 X-YPhase difference table

User can enter the X-Y mode by press Display button and select F2. In this mode, CH1 and CH2 are required to be applied simultaneously. Figure below shows an example for the XY mode display.

Figure 6-4 Waveform Display in XY Mode Attention: The following functions will be disable at XY display mode. Automatic measurement Automatic measurement mode Cursor measurement mode


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Reference ormathwaveform Vector display type Horizontal knob Triggercontrol


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Chapter VII Measurement Parameters UTD2000 series DSO support up to 28 of the automatic waveform measurement

parameters. You can view at most 5 the measurement parameters at the same time on F1-F5 function menu. To see measurement parameters, please press MEASURE on the control panel.

Figure 7-1 Function Key of Auto measurement parameter

7.1 Measurement Menu

For each of the measurement parameter located on the F1-F5 on the function measurement, you can press F1-F5 to set the view of the parameter (Measurement sub menu) Table 7-1 Measurement menu Function Menu Setting Description

Back Return to measurementparameterfunction menu

Source CH1 Select the CH1as source

CH2 Select the CH2 as source

Volt Select different Voltage parameters

Time Select different Time parameters

Parameters Press to display all the measurement parameter of the input source. Or, press to

turn of parameter display.

7.2 Voltage Parameter

Below are the automatically measured voltage parameter for the UTD2000 series DSO and its definitions:

Figure 7-2 Voltage Parameter Diagram Vpp: Peak-to-peak voltage


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Vmax: Maximum voltage level. Vmin: Minimum voltage level. Vmid: Medium voltage level. Vamp: The voltage amplitude from waveform top to bottom. Vtop: The voltage value from waveform top level to GND (Ground). Vbase: The voltage value from waveform base level to GND (Ground). Over-shoot: The ratio between (Vmax – Vtop) and voltage amplitude (Vamp) in percentage Pre-shoot: The ratio between (Vmin – Vbase) and voltage amplitude (Vamp) in percentage Average: The average amplitude of signal within 1 cycle. Vrms: Root-mean-squarevalue (effective value). 7.3 Time parameter

Below are the automatically measured timing parameter for the UTD2000 series DSO and its definitions:

Figure 7-3 Timing Parameter Diagram

RiseTime: The time of waveform amplitude rising from 10% to 90%. FallTime: The time of waveform amplitude falling from 90% to 10%. +Width: The width of positive pulse at amplitude of 50%. -Width: The width of negative pulse at amplitude of 50%. Delay (rising edge): The delay time between rising edges. Delay (falling edge): the delay time between falling edges. +Duty: The specific value of positive pulse width and cycle. -Duty: The specific value of negative pulse width and cycle.


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Chapter VIII Cursor Measurement User can press the CURSOR button to enable the cursor measurement function for

UTD2000 series DSO, where the location of the CURSOR button can be found on figure below.

Figure 8-1 Function Key of CURSOR

UTD2000 series DSO supports 3 different type of cursor measurements. Volt: Voltage (Vertical System) Time: Time (Horizontal System) Track: Volt and Time working at the same time. At the Volt cursor measurement, user should be able to see the ΔV, Va, and Vb

parameters on the display screen, where ΔV is the different between Va and Vb; User can move the Va courser by rotating the multi-purpose knob by default. Once

the location of the Vacourser is moved to the ideal location, user can press the multi-purpose knob to switch to Vb; User can move the Vb cursor by rotating the multi-purpose knob as the same way as moving the Va cursor.

At the Time cursor measurement, user can repeat the similar operation as Volt cursor measurement by using the multi-purpose knob and the.

The Track cursor measurement mode is similar to the Time cursor measurement except, it will automatic track any of the voltage level where the time cursor is pointing at the screen.

After activating the COARSE button, there will be quicker response for the cursor movement.


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Chapter IX Storage and Load System User can enter the storage and load menu by pressing the STORAGE button.

Figure 9-1 Function Key of STORAGE

Press STORAGE to go to the type menu. There are three types to choose from: Setup,Wave and Bitmap

9.1 Setup storage and load

Press the Storage button, then Press F1 to choose storege type Setup , and you will see the following menu. Table 9-1 Setup storage menu


Type Setup Select to store a DSO setting

Dest

1~20 Maximum 20 front panel setups can be storedwith themultifunction control knobon the

front panel

1~200 Set the waveform storage position on the USB device (This function can be enabled

only when theUSB device is plugged in and the disk menu is set to“USB”)

Save —— Store waveform

Load Recall the setting

9.2 Waveform storage and load

Press the Storage button, then Press F1 to choose storege type Wave , and you will see the following menu. Table 9-2 Waveform storage menu (Page 1)


Type Wave Select to store a acquired waveform

Source CH1 Select waveforms from CH1 channel to be saved

CH2 Select waveforms from CH2 channel to be saved

Dest

1~20 Maximum 20 front panel setups can be storedwith themultifunction control knobon the

front panel

1~200 Set the waveform storage position on the USB device (This function can be enabled

only when theUSB device is plugged in and the disk menu is set to“USB”)

Save —— Store waveform

Next 1/2 Get to the next page


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Table 9-3 Waveform storage menu (Page 2)


Desk DSO Select to store a acquired waveform into the internal memory of the DSO

USB Select to store a acquired waveform into the USB device

Length Normal Select to normal data length (Same data number as display)

Long Select to long data length (Same as data number as data buffered in the DSO FIFO)

Load —— Recall the waveform

—— —— ——

Previous 2/2 Go to the previous page

Figure 9-2 Storing the waveform

Figure 9-3 Storing a waveform on the USB

Waveform storage menu(Page 2), Press the F3 button, then choose RefA or RefB, and you will see the following menu. Table 9-4 Load menu


Dest 1～20 Select the callback waveform from the storage location specified inside the


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oscilloscope, and use the multi-function knob to select the position where the

waveform was previously saved.

1～200

Select the callback waveform from the specified storage location of the USB flash

drive, and use the multi-function knob to select the position where the waveform was

previously saved.

Desk DSO Callback waveform from inside the oscilloscope

USB Callback waveform from U disk

Close Close the waveform of the current callback on the screen

Load Perform a callback function to call back the value of the storage location and the

waveform corresponding to the disk to the screen.

Cancel Return to the previous menu

9.3 Bit map storage and load

Press the Storage button, then Press F1 to choose storege type Bit map , and you will see the following menu. Table 9-6 Bitmap storage menu


Type Bit map Select to storage a Bit Map file into the USB desk only

——

Dest 1~200

Destination (Position of the USB desk memory) where the bit map file will be saved.

There are 200 sets of USB desk memory available to storage bitmap file navigated by

the multipurpose knob.

Save Press to store bitmap file

——

9.4 Screen copy

You can press the screen copy key PrtSc to intercept a full screen. To use this function, follow the steps below :

1. Press the screen copy key PrtSc, copying is done when the completion screen is displayed.

2. Store the intercepted graphic on the USB device. Insert the USB device, press STORAGE and select bitmap in the type menu.

Select any storage position between 1 and 200 with the multifunction control knob, then press F4 (storage key) to complete the storage process.


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Chapter X Utility System By pressing the UTILITY function button on the menu area, user can set different

utility setting, where the button location are shown in figure below.

Figure 10-1 Function Key of UTILITY

Table 10-1 Utility menu(Page 1)


Self-Adj Execute Press to execute self- calibration function

Close Leave self-calibration

Pass/Fail Set waveform Pass/Fail operation(Only UTD2025CL have such

function)

Recorder Set waveform recording operation.

Language Press to change to different system language

Next 1/3 Press to next Utility Function Menu page



Factory Execute Reset to factory default setting

Cancel Cancel and return to Utility Function Menu

——

Skin 1、2、3、4 Change the skin for the function menu

Grid Bright 1%-100% Adjust the grid brightness by using the multi-purpose knob

Next 2/3 Press to next Utility Function Menu page



Version Press to view the system version.

——

——

Frequency

Counter

ON To turn on frequency counter

OFF To turn off frequency counter

First 3/3 Back to page 1

10.1 Pass/Fail


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One of the very usefully function is the pass/fail detection function(Only for UTD2025CL). You can create a template of pixels area to compare with the input signal. User can also select the output condition for the logical result between the templates of area and the input source.

Rear panel of Pass / Fail output You can enable the PASS/FAIL function by pressing F1 on the PASS/FAIL function

menu. After turning on this function, you can see the total number of waveform being process, the number of waveform pass and the number of waveform fail on the LCD screen. Table 10-4 Pass/Fail function menu


Status ON Press to turn on the PASS/FAIL function

OFF Press to turn off the PASS/FAIL function

Source

CH1 Select CH1 as the detection signal source

CH2 Select CH2 as the detection signal source

MATH Select MATH result as the detection signal source

RefA Select RefA as the detection signal source

RefB Select RefB as the detection signal source

Output

Pass Select the logical result as input signal within the template of pixels area

Fail Select the logical result as input signal outside of the template of pixels area

Pass/Halt Same as Pass output condition; Stop once detected.

Fail/Halt Same as Fail output condition; Stop once detected.

Template Press to create template of pixel area, See Table 10-5.

Back Return to Utility Function Menu

After pressing the F4 on the Pass/Fail function menu, you will be able to create a

Template of pixels to be compared. Table 10-5 Template Setting



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Create According to adjustment, build horizontal and vertical Pass/Fail tolerance range.

Horizontal 1-200Pixel Press F2 to select horizontal length and use the multi-purpose knob to set the

pixel length for the horizontal length;

Vertical 1-100Pixel Press F3 to select vertical length and use the multi-purpose knob to set the pixel

length for the vertical length;

Return Return to pass detection menu

Back Return to Utility function menu

10.2 Recorder

The waveform recorder function at the UTD2000 series DSO is generally easy to operate. User should set up Source and Operation as in below table. Table 10-6 Recorder menu


Source

CH1 Select CH1 as recording signal source

CH2 Select CH2 as recording signal source

CH1+CH2 Select CH1and CH2 as recording signal sources

Operation

Press to start waveform recording;

The number waveform being recorded is show on the screen.

Press to start waveform replay

Press to stop waveform recording

Save 1~200 Save waveform recording into USB memory; Select from 1-200 memory location;

Press F3 to save.

Load 1~200 Loadthewaveform recording into USB memory; Select from 1-200 memory

location; Press F4 to load.

Back Press to return to Utility function menu

You will need to press F1 to confirm creating the pixel template after setting the horizontal and vertical length of the pixels.


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Chapter XI Other funtion botton

11.1 AUTO

figure 11-1 Function Key of RUN/STOP and AUTO

As shown in above figure, automatic setup is to simplify operation. Digital storage oscillograph can adjust vertical deflection coefficient and horizontal time base gear automatically for stable waveform display on the screen according to waveform amplitude and frequency when user presses AUTO key. System setup is shown in following form during automatic setup:

Function Setting

Obtainment mode Sampling

Display format Set to YT

Horizontal position Automatic adjustment

Second/Divs Adjustment according to signal frequency

Hold off The minimum value

Trigger level Set to 50%

Trigger mode AUTO

Trigger source Set to CH1; Set to CH2 when exerting on

signal for it if there is no signal for CH1;

Trigger gradient Ascending

Trigger type Edge

Vertical band width All

Volt/Divs Adjustment according to singnal amplitude

11.2 RUN/STOP There is a button on the top right hand corner on the front panel : RUN/STOP . When this button is pressed and a green indicator lights up, your oscilloscope is in a running status. If a red light comes on after pressing this button, it indicates the unit has stopped operation. Acquire waveform continuously or stop acquisition. If you want the oscilloscope to acquire waveform continuously, press RUN/STOP once. Press the button again to stop acquisition. You can use this button to switch between acquiring and stop acquiring waveform. In the Run mode, a green light comes on and AUTO appears on the screen. In the STOP mode, a red light comes on and STOP appears on the screen.


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11.3 Help Menu Press the HELP key to into help menu，then press any key will display the help information of this key. 11.4 Upgrade program

TheUSBupgrade program makes upgrade easier and more flexible. To use this function followthe steps below:

(1) Check themodel name, software and hardware versions of your oscilloscopein Table 2-19.

(2) Download the highest version of the update program document that matches your model, software and hardware versions online, and store it on the USB device (preferably a USB device recommended by us).

(3) Power off the oscilloscope then insert the USB device. Then power on the oscilloscope again. The prompt Please press F5 to continue or F1 to cancel appears on the screen as shown in the figure on theright

Figure 11-2 USB update confirmation

(4) When F5 is pressed, the prompt on the right will appear: “Are you sure you wish to

update? If yes, press F5, otherwise press F1 to cancel upgrade”. (5) When the USB document is confirmed the following prompt will appear : “System

upgrade is in progress. Please wait”. (This process may take 3 to 5 minutes)


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Figure 11-3 USB upgrade in progress

(6) When update is complete, a successful update prompt will appear: “Upgrade is successfully complete. Please 5. When the USB document is confirmed the following prompt will remove USB device, then power off your oscilloscope and power it back on again to complete the process.” The oscilloscope program is now updated and system upgrade is complete. In the event of update failure, follow the steps below.

Note: please make sure that the power supply is on throughout the upgrade

process in order to avoid the incomplete upgrade. If the system is not completely upgraded, it might not be able to restart.


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Chapter XII Applicaion example Example 1: Measuring simple signals

To observe and measure an unknown circuit signal, and to quickly display and measure the signal's frequency and peak-to-peak value.

(1) To quickly display this signal, follow the steps below： ① In the probe menu, set the attenuation factor to 10X and set the switch on the

probe to 10X. ② Connect the CH1 probe to the circuitry point to be measured press AUTO. ③ The oscilloscope will carry out auto setup to optimise waveform display. In this

status, you can further adjust the vertical and horizontal range until you get the desired waveform display. (2) Voltage and time parameters for automatic measurement Your oscilloscope can automatically measure most display signals. To measure

signal frequency and peak-to-peak value, follow the steps below : ① Press MEASURE to display the automatic measurement menu.

② Press F1 to enter the measurement type selection menu. ③ Press F3 to select Voltage； ④ Press F5 to go to page 2/4, then press F3 to select measurement type : Peak

value.

Figure 12-1 Automatic measurement

⑤ Press F2 to enter the measurement type selection menu, then press F4 to select Time.

⑥ Press F2 to select measurement type : Frequency. Peak-to-peak value and frequency measurement value are now displayed in positions F1 and F2 respectively.

Example 2: Observing the delay caused by a sine wave signal passes through the circuit

As in the previous scenario, set the probe attenuation factor of the probe and


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oscilloscope channel to 10X. Connect the CH1 to the circuit signal input terminal. Connect CH2 to the output terminal.

Steps : (1) To display CH1 and CH2 signals

① Press AUTO. ② Continue to adjust the horizontal and vertical range until you get the desired

waveform display. ③ Press F1 to select CH1. Adjust vertical position of the CH1 waveform by

turning the vertical position control knob. ④ Press F2 to select CH2. In the same way described above, adjust vertical

position of the CH2 waveform so that the waveforms of CH1 and CH2 do not overlap. This will make observation easier.

2. Observing the delay caused by a sine wave signal passes through the circuit and observing waveform changes.

① When measuring channel delay automatically: Press MEASURE to display the automatic measurement menu. Press F1 to enter the measurement type selection menu. Press F4 to enter the time measurement parameters table. Press F5 twice to go to page 3/3. Press F2 to select delayed measurement. Press F1, select CH1 and then press F2 to select moving to CH2, then press F5

to confirm. You can see the delay value below “CH1-CH2 delay” in the F1 zone now. ② Observe waveform changes (see the figure below).

Figure 12-2 Waveform delay

Example 3: Acquiring single signals

The advantage and special feature of your digital storage Oscilloscope lie in its ability to acquire non cyclical signals like pulse and glitch. To acquire a single signal, you must have transcendental knowledge of that signal to set the trigger level and trigger edge. For


50

example, if the pulse is a logical signal of TTL level, the trigger level should be set at about 2V and the trigger edge should be set to rising edge trigger. If you are not certain about the signal, you can observe it by automatic or normal trigger to determine the trigger level and trigger edge.

Steps : (1) As in the previous illustration, set the attenuation factor of the probe and CH1. (2) Carry out trigger setup

① Press TRIG MENU in the trigger control zone to display the trigger setup menu.

② In this menu, use F1~F5 set the trigger type to EDGE, set trigger source to CH1, set inclination to Rising, set trigger type to Single and set trigger coupling to AC.

③ Adjust horizontal time base and vertical range to an appropriate range. ④ Turn the TRIGGER LEVEL control knob to get the desired ⑤ Press RUN/STOP and wait for a signal that meets the trigger condition. If any

signal reaches the set trigger level, the system will sample once and display it on the screen. By using this function you can easily acquire any occasional event. For example, when a sudden glitch of relatively big amplitude is acquired : set the trigger level to just higher than the normal signal level. Press RUN/STOP and begin waiting. When a glitch occurs, the machine will automatically trigger and record the waveform immediately before and after triggering. By turning the horizontal POSITION knob in the horizontal control zone on the front panel, you can change the trigger position horizontally to achieve negative delay trigger of various lengths for easy observation of waveform occurring before the glitch

Figure 12-3 Single signal

Example 4: Reducing random noise of signals

If the signal being measured is stacked with random noise, you can adjust the setups of your oscilloscope to filter or reduce the noise, so it will not cause interference to the signal during measurement. (Waveform is shown below)


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Figure 12-4 Reducing random noise of signals

Steps :

(1) As in the previous illustration, set the attenuation factor of the probe and Ch1. (2) Connect the signal to ensure stable display of waveform. See the previous

illustration for operation instruction. See the previous chapter for guidance on adjusting the horizontal time base and vertical range.

(3) Improving trigger by setting trigger coupling. ① Press TRIG MENU in the trigger zone to display the trigger setup menu. ② Set trigger coupling to Low Frequency Suppession or High Frequency

Suppession. By selecting low frequency suppression a high-pass filter is set up. It filters low frequency signal quantities under 80kHz and allows high frequency signal quantities to pass through. If you select high frequency suppression a low- pass filter is set up. It filters high frequency signal quantities higher than 80kHz and allows low frequency signal quantities to pass through. By setting Low Frequency Suppession or High Frequency Suppession, you can suppress low frequency or high frequency noise respectively and achieve a stable trigger. (4) Reducing display noise by setting the sampling mode.

① If the signal being measured is stacked with random noise and the waveform is too coarse as a result, you can use the average sampling mode to eliminate random noise display and reduce the size of waveform for easy observation and measurement. After getting the mean, random noise is reduced and details of the signal are clearer. Follow the steps below:

Press ACQUIRE in the menu zone of the front panel to display the sampling setup menu. Press menu operation key F1 to set acquisition mode to AVERAGE, then press the multifunction control knob to adjust the average number of times in multiples of 2, i.e. 2 to 256, until you get the desired waveform display that meets observation and measurement requirements. (See the figure below)


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Figure 12-5 Signal noise suppressed

② You can also lower the waveform brightness to reduce display noise Caution :In the average sampling mode the waveform display will update at a

slower rate. This is normal. Example 5: Using the cursors for measurement

Your oscilloscope can measure 28 waveform parameters automatically. All auto parameters can be measured with the cursors.

By using the cursors, you can quickly measure the time and voltage of a waveform. Measuring one step voltage of the step signal To measure one step voltage of the step signal, follow the steps below: 1. Press CURSOR to display the cursor measurement menu. 2. Press menu operation key F1 to set cursor type to VOLTAGE. 3. Turn the multifunction control knob to set cursor 1 at one step voltage of the step

signal. 4. Press SELECT to select the cursor, then turn the multifunction control knob again

to set cursor 2 at another step voltage of the step signal. The cursor menu will automatically display the V value, i.e. the voltage difference of

that point. See the figure below. Note : When using the cursors to measure time, follow step 2 only and set the

cursor type to time.


53

Figure 12-6 Using the cursors to test signal voltage


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Chapter XIII System Prompts and

Trouble-shooting 13.1 Definitions of System Prompts

Adjustment at Ultimate Limit: This informs you that the multifunction control knob has reached its adjustment limit in the current status. No further adjust is possible. When the vertical deflection factor switch, time base switch, X shift, vertical shift and trigger level adjustments have reached their ultimate limits, this prompt will appear.

USB Device Installed: After a USB device is plugged into the oscilloscope, this prompt appears when the connection is valid.

USB Device Unplugged: After a USB key is unplugged from the oscilloscope, this prompt appears.

Saving: When the oscilloscope is saving a waveform, this prompt is shown on the screen. A progress bar appears at the bottom.

Loading: During waveform recall, this prompt is shown on the screen. A progress bar appears at the bottom. 13.2 Troubleshooting

(1) If the screen of your oscilloscope remains black without any display after powering on, follow the steps below to find the cause :

① Check the power cable connection and check if there is normal power supply. ② Check if the power switch is properly pressed. ③ Restart the unit after performing the above checks. ④ If the unit still fails to work, contact UNI-T to request service.

(2) If no waveform is displayed after you have acquired a signal, follow the steps below to find the cause:

① Check whether the probe is properly connected to the signal lead. ② Check whether the signal lead is properly connected to the BNC (channel

adaptor). ③ Check whether the object for measurement is generating signals (connect the

channel with signals to the question able channel to find the cause). ④ Restart the acquisition process.

(3) The measurement voltage amplitude value is 10 times larger or smaller than the actual value:

Check if the channel attenuation factor corresponds with the probe attenuation you have chosen. (4) There is waveform display but it is not stable :

① Check the trigger Source setup in the trigger menu. See whether it is the same as the actual signal input channel.

② Check the trigger type: Use Edge trigger for ordinary signals and Video trigger


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for video signals. Stable waveform display is achieved only when the correcttrigger mode is selected.

③ Try changing the Couping display to High Frequency Suppression or Low Frequency Suppression or to filter any high or low frequency noise that is interfering with triggering. (5) No display after pressing RUN/STOP :

① Check if the trigger mode is set to NORMAL or SINGLE in the menu, and whether the level exceeds the waveform range.

If so, move the trigger level to the centre or set trigger mode to AUTO ② Press AUTO to complete the automatic setup.


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Chapter XIV Technical Information Unless otherwise specified, all technical specifications are applicable to the probes

with attenuation switch set as 10× as well as UTD2000 series DSO. DSO must first meet the following two conditions to meet those specification standards:

The instrument must continuously operate for over half an hour with in the operating temperature.

If the operating temperature has exceeds 5, please perform the “Self-Adjustment ”function in the UTILITY system function.

Any of the specification with “Typical” value represented is for reference only。

Technical Specification Acquire System Specification

Model UTD2025CL UTD2052CL UTD2102e UTD2052CEX UTD2072CEX UTD2102CEX

Real-time 250MS/s 500MS/s 500MS/s 1GS/s

Equivalence —— 25GS/s 25GS/s 50GS/s

Average N can be chosen among 2, 4, 8, 16, 32, 64, 128 and 256; N is the number of average

samples.

Input Channel Specifications

Input Coupling DC, AC and GND

Input impedance (1MΩ± 1%)//(24pF± 3 pF)

Probe attenuation

coefficient 1×， 10×， 100×， 1000×

Maximum input

voltage 400V (DC+AC peak value, 1MΩ input impedance)

Horizontal System Specification

Scanning scope 5ns/div-50s/div

Waveform interpolation Sin(x)/x

ampling rate and delay time

accuracy ±50ppm (any time interval≥1m)

Record length 2×512k sampling point

Storage depth Single channel: 25k；Double channel: 12.5k

Sampling rate and delay

time accuracy

±50ppm(any time interval ≥1ms )

Measurement accuracy of

time interval (T) (full

bandwidth)

Single time: ± (1 sampling time interval+50ppm×reading+0.6ns)

>16 average values: ± (sampling time interval+50ppm×reading+0.4ns)

Vertical


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Model UTD2025CL UTD2052CL UTD2102e UTD2052CEX UTD2072CEX UTD2102CEX

Analog Bandwidth 25MHz 50MHz 100MHz 50MHz 70MHz 100MHz

Rise Time(Typical) ≤14ns ≤7ns ≤3.5ns ≤7ns ≤5ns ≤3.5ns

Channels 2

Analog-to-digital converter

(A/D) 8bit

Deflection factor range

(V/div) 1mV/div~20 V/div(at 1-2-5 increment)

Position range ≥±10div

Selectable bandwidth

limitation (Typical) 20MHz

Low frequency response

(AC Coupling，-3dB) ≤10 Hz(at BNC)

DC gain accuracy

(sampling or average

sampling mode)

10mV ~20V/div：≤±3%

5mV/div：≤±4%

1mV ~2mV/div：≤±5%

DC measurement

accuracy

(average sampling mode)

When vertical position is 0 and N≥16:

± (5%×reading+0.1div+1mV) and selects 1mV /div or 2mV /div;

± (4%×reading+0.1div+1mV) and selects 5mV /div;

± (3%×reading+0.1div+1mV) and selects 10mV /div or 20mV /div;

When vertical position is 0 and N≥16:

±(3%×(reading + vertical position reading) + (1%×vertical position reading)]+0.2div)

The setting from 5mV/div to 200mV/div plus 2mV;

the setting value from 200mV/div to 20V/div plus 50mV

Measurement accuracy of

voltage difference (V)

(average sampling mode)

Under the same setting and environment conditions and after averaging the captured waveforms with a

quantity of ≥16, the voltage difference (ΔV) between any two points on the waveform: ±

(3%×reading+0.05div)

Trigger System Specifications

Trigger sensitivity ≤1div

Range of trigger level Interior：From the screen center ±5div

EXT： ± 3V

Trigger level accuracy (Typical) applicable for the signal with rising and falling time ≥20ns

Interior：±(0.3div×V/div) (within±4 div from the screen center)

EXT：±(6% setting value+40mV)

Pre-trigger capacity Normal mode/scan mode, pre-trigger/delay trigger, the pre-trigger depth

adjustable

Hold-off range 80ns~1.5s

Set the level to 50% (Typical) Operate under the condition of input signal frequency of ≥50Hz

Edge trigger


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Edge Rise, fall, rise&fall

Pulse width trigger

Trigger mode >、<、=

Polarity positive pulse width, negative pulse width

Pulse width range 20ns~10s

Video trigger (only UTD2025CL)

Trigger sensitivity (Typical) 2div Vpp

Signal model and line/field

frequency (video trigger

type)

Support standard NTSC and PAL, and the line number scope is respectively 1-525

(NTSC) and 1-625 (PAL)

Alternating trigger

Alter Edge, Pulse

Measurements

Cursor Cursor Parameters

Voltage difference between cursors (V),

Time difference between cursors (T),

Reciprocal of T (Hz) (1/T))

Track Voltage value and time value of point of waveform

Automatic

measurement

Vpp, Vamp, Vmax, Vmin, Vtop, Vbase, Vmid, Average, Vrms, Overshoot, Preshoot, Frequency,

Period, RiseTime, FallTime, +Width, -Width, +Duty, -Duty, Delay

Math

Math operation +, -, ×, ÷

Window Rectangle, Hanning、Blackman、Hamming

Sampling size 1024points

Trigger frequency meter

Reading resolution 6 bits

Trigger sensitivity ≤30Vrms

Accuracy (Typical) ±51ppm (+1 character)

Display

Displays types LCD with Diagonal of 178mm (7-inch)

Display resolution UTD2025CL, UTD2052CL, UTD2102e：400 horizontal×RGB×240 vertical pixels

UTD2000EX Series：800 horizontal×RGB× 480 vertical pixels

Display color Color

Waveform luminance Adjustable (color)


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Backlight intensity (Typical) 300nit

Interface function:

Standard configuration 1 USB OTG

General Technical Specification

Probe compensator output

Output voltage (Typical) About 3Vpp, when the load≥1MΩ

Frequency (Typical) 1kHz

Power Source

Power voltage 100V～240VACRMS，50/60Hz，CAT II

Power consumption ≤100VA

Fuse 1.6AL 250V (Fuse is located inside the instrument housing)

Environment Specifications

Temperature Range Operating Temperature Range: 0~+40

Storage Temperature Range: -20~+60

Cooling Build-in cooling fan

Operating Humidity Range<35: ≤90%RH

35~40: ≤60%RH

Operating Altitude Below 3,000m

Mechanical specifications

Size 306mm(W)×147mm(H)×122mm(D)

Weight UTD2000L&UTD2000EX： Excluding package：2.5kg Including package：3.5kg

UTD2102e：Excluding package：2.5kg Including package：3.5kg

I P protection

IP2X

Recommended calibration Interval

The recommended calibration interval is every one year


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Chapter XV Appendix Appendix A Accessories of UTD2000 Series Two probes (selectable for 1:1 and 10:1).

Please refer to instructions on probe accessories for details. Probe conforming to EN61010-031 standards.

When the switch is at 1× position, it belongs to 150V CAT II. When the switch is located in 10× position, it belongs to 300V CAT II.

One power cable One software CD One USB Cable: UT-D05 Please order all the accessories (standard parts and optional parts) from the local UNI-T distributors. Appendix B Maintenance and Cleaning (1) General Maintenance

Please do not store or place the instrument at any places where the LCD of the instrument is exposed to sunlight directly.

Caution: Please do not stain the instrument or probe with spray, liquid or solvent, so as to avoid damaging the instrument or probe. (2) Clearing

Check the instrument and probe frequently. Clean the surface of the instrument according to the following steps:

① Please wipe the surface the instrument and probe with soft cloth. Pay attention not to scratch the LCD screen.

② Wipe the instrument with wet clothafter disconnecting the power supply. Use detergent or clear water to clean. Do not use any abrasive chemical cleaning agent to avoid damaging the instrument or probe.

Warnings: Please make sure that the instrument is completely dry before powering on again, to avoid electrical

short circuit or injury.

Appendix C Warranty

UNI-T (Uni-Trend Technology (China) Co., Ltd.) warrants that product produced and marketed by it will be free from defects in materials and workmanship for a period of three years from the date of shipment by the authorized dealer. If any such product proves defective during this warranty period, UNI-T will repair the defective product or provide a replacement according to specific terms and conditions of the warranty. To request maintenance and repair service or a full copy of the warranty, please contact your nearest UNI-T sales and maintenance office.

Save and except the guarantee given herein or in other applicable warranty, UNI-T makes no other express or implied guarantee, including but not limited to any implied


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guarantee on the product's tradability and suitability for any specific purpose. Under no circumstance will UNI-T bear any liability for any indirect, special or subsequent loss. Appendix D Contact Us

If you encounter any inconvenience in using this product, contact Uni- Trend Electronic (Shanghai) Limited (Uni-T, Inc.) in China directly.

For product support outside China, contact your local UNI-T supplier or sales centre. Service Support : Many UNI-T products offer optional plans of extended warranty

period or calibration period. For details please contact your local UNI-T supplier or sales centre.

A list of service centres worldwide is available online at http://www.uni-trend.com


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Documents

UTD2000 Series User Manual - instruments.uni-trend.com